Log-loader.



' PATENTED JUNE 25. 1907. J. R. MOGI'PFERT. A

Los LOADER. APPLICATION FILED DEO. 30. 1904.

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No. 857,654. PATENTED JUNE z5. 1907. J. R. MGGIFFBRT. LOG LOADER. APPLICATION FILED DEU. 30, 1904.

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l UNITED STATES PATENT OFFIOE.

JOI-IN R. MCGIFFERT, OF DULUTII, MINNESOTA, ASSIGN OR TO OLYDE IRON WORKS, OF DULUTH, MINNESOTA, A CORPORATION OF MINNESOTA.

LOGI-LOADER.I

Specication of Letters Patent.

Patented June 25, 1907.

Application filed December 30, 1904. Serial No. 288,982.

To a/ZZ wh/0m, it rita/y concern:

Be it known that I, JOHN R. MCGIFFERT, a citizen ofthe United States, and a resident of Duluth, county of St. Louis, State of Minnesota, have invented a new and useful Improvement in Log-Loaders, of which the following is a speciiication, the principle of the invention being herein explained, and the best mode in which I have contemplated applying that principle, so as to distinguish it from other inventions.

My invention relates to log-loading machines and particularly to `certain improvements on a machine such as is shown and claimed in Patent N o. 715,840 granted to me December 16, 1902.

The object of the present invention is to secure a log-loader construction such as will embody great flexibility whereby the logloading machine may be made to conform its characteristics'to all the requirementsA necessitated by the irregularities in the roadbed over which they are usually operated.

The said invention consists of means hereinafter Jully described and particularly set forth in the claims.

The annexed drawings and the following description set forth in detail certain means embodying my invention, such disclosed means constituting but lone of various mechanical Jformsin which the principle of the invention may be used.

In said annexed drawings Figure 1 represents a side elevation of a log-loader frame embodying my invention, the log-loader of which this frame forms a part being fully described as to its general construction and operationin the above named patent. Fig. 2 represents a similar view wherein the movable trucks are shown disengaged from the track. Fig. 3 represents an end view of such log-loader frame, the trucks 'therein being shown as engaging the tracl Fig. 4 represents a detail sectional view of that part of the frame forming a bearing for one of the wheel-trucks. Fig. 5 represents a detail cross-section taken upon the plane indicated by the line 5-5, Fig. 4. Fig. 6 represents a detail view in plan of the parts shown in Figs. 4 and 5. Fig. 7 represents partly in plan and partly in cross section thelower end of one of the supporting feet of the lo ader. Figs. 8 and 9 represent respectively front and side elevations of one of said feet. Fig. 10 represents,

upon an enlarged scale, a side elevation of one of the shoes attached to said feet, and Fig. 11 represents a front elevation of said shoe.

As illustrated in Figs. 1 and 2, the logloader frame is provided with four upright legs A, A, whose lower ends are curved inwardly to form feet a, a. The inner ends of these feet are each provided with a shoe A, A', the specic construction of which will be hereinafter explained in detail. These shoes are separated from each other transversely a distance such that they may rest upon the ties of the road-bed outside of the rails, and the curvature of the feet is such that when a swinging frame B carrying the trucks O is raised, a logging-car may be passed under the frame upon the rails d, d, of the track.

As described in the above named patent, the swinging Jframes are of a length such that when the wheels of the trucks engage the rails d, d, the shoes ot' the legs A will be raised above the ties so that the frame and hoisting mechanism carried thereby may be readily moved upon the track from place to place, suitable mechanism being provided to raise and lower the frames B and propel the device along said track.

' As illustrated in the drawings, Figs. 7 and 9, each leg consists of three I-beams suitably bent to give the necessary curvature to the feet. The extreme end of each foot consists of two heavy iron castings A2, A2 which are secured between each two adjacent I-beams in a suitable manner by means of bolts and nuts a', 0,. The extremities of these castings together form a horizontal member a2 having an upper and a lower convex surface, as shown in Figs. 8 and 9. Each such extremity is formed with a vertical cylindrical hole, a3, a3 respectively. Upon each of these members az'is mounted a shoe A. Each of these shoes consists of a lower base member a4 consisting of-a flat bar of iron having upturned ends, and an upper member 1,5 consisting of a similar flat bar of iron bent in the manner shown in Fig. 10.v Such upper member a5 is riveted to base member a4, cast iron separators a6 of wedge shape being interposed whereby an interior central space a7 is formed into which member c2 of the foot projects as indicated in dotted lines, Fig. 10. This member a2 is secured in such space by means of two bolts a8 passing through suitable ver- IOO tical holes drilled in the shoe to register with the holes a3 a3 in the foot, such latter holes, however, being larger than the bolts in order upon the trucks, such rocking being accompanied by a rolling contact between the castings B and the yokes C, thus reducing the that the shoe may be capable of limited weight on these parts to a minimum by almovement upon the foot. The upper shoe member a5, it will be observed, not only serves to strap the foot onto the base member a4, but by virtue of its arched shape serves as a compression member to stiifen such base member against any tendency to bend under the pressure of the foot. When the weight of said hoisting mechanism is upon the foot and shoe, the lower convex surface of the member a2 rests upon the base member at of the shoe, forming a rolling bearing and owing to the peculiar construction above referred to, the latter may adjust itself within certain limits to conform to inequalities of surface presented by the contiguous ties of the roadbed which it engages. When the frame is lowered upon the feet and shoes it will be seen that the members a2 of the former will adjust themselves by rolling upon their .supporting surfaces, thus reducing the wear thereon to a minimum. There is a further obvious advantage in the above construction, namely, that by laterally inserting the foot into the shoe, space is economized and the foot more solidly supported. This saving of space is a mattery of necessity for the foot must rest close alongside the rails of the track and yet not interfere with the passage of cars upon the latter. In ordinary practice, hence, the total height of foot and shoe combined cannot be made more than four or four and one-half inches. In the above construction I meet the conditions thus imposed by cutting out the material of the shoe along its neutral axis, that is by removing the material which is least essential to the strength of the shoe, in order to make room for the placing of the foot. In order to prevent slippage of the shoes on the ties calks a are securely riveted to the bottom of the base member a4.

The ends of the axles c of the trucks are journaled in sliding boxes c', c resiliently mounted in the lower end of the pivoted members b, b of the frame B, in the usual manner of truck bearings. The rear truck is provided with an arched yoke C whose upper central portion is curved, as shown, and provided with an integral lug c2 centrally located, as shown in Fig. 4. This curved portion of the yoke receives the weight of the frame through the medium of two castings B.

secured to the cross-pieces B2 of the frames B, as shown in Figs. l and 3. The lower surface of each of said castings is convex and intersecting the same is a cavity b for receiving the lug c2. Said cavity is made of considerably larger dimensions than the lug c2 so that the latter may have a limited amount of free play therein. The above described construction permits the frame to rock laterally lowing the entire construction to be iiexible.

Other modes of applyingthe principle of my invention may be employed instead of the one explained, change being made as regards the means herein disclosed, provided the means stated by any one of the following claims or the equivalent of such stated means be employed. l

I therefore particularly point out and distinctly claim as my invention l. In a log-loading machine, the combination with a frame-supporting foot having a substantially horizontal end portion, of a shoe having an aperture adapted to loosely receive said foot.

2. In a log-loading machine, the combination with aframe-supporting foot having a substantially horizontal end portion, of a shoe having a central aperture adapted to loosely receive said foot.

3. In a log-loading machine, the combination with a frame-supporting foot having. a horizontal end portion, of a shoe attached thereto and in rolling contact therewith.

4. In a log-loading machine, the .combination with a frame-supporting ioot having a horizontal end-portion, of a shoe provided with an aperture adapted to receive said foot, said shoe being oscillatory about said foot.

5. In a log-loading machine, the combination with a frame-supporting foot having a horizontal end-portion, of a shoe provided vwith an aperture adapted to receive said foot, said shoe having a limited oscillatory movement about said foot.

6. In a log-loading machine, the combination with a frame-supporting foot having a horizontal end portion, of a shoe having a central aperture for receiving said foot, said shoe and foot being respectively. provided with bearings for rolling contact with each other. l

7. In a log-loading machine, the combination of a frame-supporting foot having a horizontal end portion provided with a convex lower bearing surface, of a shoe attached loosely to said foot, such shoe forming a support for said convex bearing surface, whereby said foot and shoe may be in rolling contact with each other.

8. In a log-loading machine, the combination with a frame-supporting foot having a horizontal end-portion provided with a convex lower bearing surface, of a shoe provided with an aperture adapted to receive said foot, said shoe forming a support for said convex bearing surface whereby a rolling contact is had between said foot and shoe.

9. In a log-loading machine, the combination with a frame-supporting foot having a substantially horizontal end-portion, of a .IOO

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shoe having a horizontal aperture through its neutral axis for the reception of said foot.

10. In a log-loading machine, the combination with a frame-supporting foot having a substantially horizontal end-portion, of a shoe having a horizontal aperture through its neutral axis adapted to loosely receive said foot.

11. In a log-loading machine, the combination with a frame-sup orting foot having a substantially horizonta end-portion of a shoe having a horizontal aperture through its neutral axis for the reception of said foot, the portion of said shoe below such aperture serving as a tension member and the portion above such aperture serving as a compression member;

12. In a log-loading machine, the combination with a frame-supporting foot having a `substantially horizontal endportion, of a shoe having a horizontal aperture through its neutral axis, such aperture being elongated along said neutral axis and being adapted to loosely receive said foot, the portion of said shoe below such aperture serving as a tension member and the portion above such aperture serving as a compression member.

13. In a log-loading machine, the combination with a frame-supporting foot having a horizontal end portion formed with a lower convex curved surface, of a shoe consisting of a lower horizontal member, an upper member, separators forming an intermediate open space, and bottom contact pieces, said horizontal end portion of the foot being seated and loosely secured in said space.

14. In a log-loading machine, the combination with a frame-supporting foot having a horizontal end portion, of a shoe comprising a base member and an upper strap adapted to secure such end portion of said supporting foot to said base member.

15. In a log-rolling machine, the combination with a frame-supporting foot having a horizontal end portion, of a shoe comprising a base member formed of a flat metal bar with upturned ends and an upper bar forming a compression member and adapted to secure such end portion of said supporting foot to said base member.

16. In a log-loading machine, the combination with a frame-sup orting foot having a horizontal end portion ormed with a lower convex curved surface, of a shoe comprising a base member formed of a f lat metal bar with upturned ends, an upper bar forming a compression member and adapted to secure such end portion of said supportin foot to said base member, and blocks secure between said base member and said upper bar.

17. In a log-loading machine, a shoe for a frame-supporting foot, comprising a basemember formed of a dat metal bar having its extremities turned up, an upper fiat metal bar having its extremities riveted to said base-member and near the end thereof, wedge-shaped separators secured between said base member and strap, and calks secured to the bottom of said base member.

18. In a log-loading machine, the combination of a car axle, a frame supported upon said axle and adapted to rock laterally thereof, and boxes slidably mounted in said frame and adapted to receive the ends of said axle.

19. In a log-loading machine, the combination of a frame, boxes slidably mounted in said frame, a' car axle having its ends journaled in said boxes, and an arched yoke mounted on said axle and adapted to receive the weight of said frame.

20. In a log-loading machine, the combination of a frame, boxes resiliently mounted in said frame, a car axle having its ends journaled in said boxes, and an arched yoke mounted on said axle and adapted to receive the weight of said frame.

21. In a log-loading machine, the combination of a frame provided with a member having a curved convex bearing surface, boxes slidably mounted in said frame, a car axle having its ends j ournaled in said boxes, and an arched yoke mounted on said axle and contacting with the convex bearing surface of said frame member.

22. In a log-loading machine, the combination of a swinging frame, boxes slidably mounted in said frame, a car axle having its ends j ournaled in said boxes, and an arched yoke mounted on said axle and adapted to receive the weight of said frame.

23. In a log-loading machine, the combination of a frame provided with a member having a convex bearing surface provided with a central cavity, boxes slidably mounted in said frame, a car axle having its ends j ournaled in said boxes and an arched yoke mounted on said axle and contacting with the convex bearing surface of said frame member, said yoke being provided with a lug adapted to engage the cavity in said member.

24. In a log-loading machine, the combination with the loader-body, of a frame pivotally attached thereto on a transverse axis and rovided with a member having a convex caring surface provided with a central cavity, boxes slidably mounted in said frame, a car axle having its ends j ournaled in said boxes, and an arched yoke mounted on said axle and contacting with the convex bearing surface of said frame member, said yoke being provided with a lug adapted to engage the cavity in said member.

Signed by me, this 10th day of December 1904.

JOHN R. MCGIFFERT.

Witnesses:

ARTHUR W. HUNTER, N. M.v NELsoN.

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